Schaefer said those talks are taking place between Bruce Binkow, a high-level Golden Boy executive, and Todd duBoef, the president of Top Rank, Pacquiao's promoter.

"Todd and Bruce are trying to work out the specifics of the cutoff to assure the tests are still effective because we know that 30 days before is not effective," Schaefer said. "At 30 days, we might as well not even do it. We want to figure it out [the cutoff window] and I will give my recommendation to Team Mayweather, and they will be on board. USADA is the most recognized one, but if it's another one, like the Nevada commission, we don't really care. I don't care who performs the tests as long as they are performed. That's our position. If this fight doesn't happen it's not because of Team Mayweather."